Twitter Two Factor Authentication Now Possible Without Linking A Number

Twitter Two Factor Authentication Now Possible Without Linking A Number - Surge Zirc SA
To fight spam, Twitter is dramatically reducing the number of accounts users can follow each day / Photo file: WAAY

Twitter two factor authentication is now very much possible without linking a phone number. The social media company updated today that users can now enable two-factor authentication on their account without linking any phone number at all.

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While SMS-based Twitter two factor authentication can be a serious problem for people who lose access to code-generating devices or don’t have security keys, it’s very vulnerable to SIM-swapping attacks. Twitter added code generator support a while ago, but still required users to add a phone number to be able to make use of the extra verification and they won’t be able to remove the fallback.

That alone is a big setback for anyone who cares much about their privacy issues on social media, they may not want to link a phone number to their account at all, and Twitter has already conceded that it used phone-numbers to target ads even for users who declined that.

Hackers used SIM-swapping to send tweets from Twitter CEO Jack Dorsey’s account earlier this year, and while the exploit didn’t use two-factor codes, that revealed how vulnerable the SMS-based system can be.

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If you already have a phone number linked in your profile, then you can go ahead and remove it now. However, a security engineer noted that you can’t remove the number and rely simply on a security key for access since that’s only supported on the website.

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